The single unit Wuhan-class Trials Submarine is a Modified R-class submarine with YJ-1 anti ship missiles launchers. The six YJ-1 missiles have active radar homing to 40 km at 0.9 mach sea-skimming and has a 165kg war head. It's also armed with 533mm torpedoes with passive homing to 15 km at 40 knots and has warhead of 400 kg. This sub is built as a trials SSM platform, and others may be converted in due course.